* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f5f7fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    min-height: calc(100vh - 72px);
}

.hero-section {
    text-align: center;
    max-width: 800px;
    margin-bottom: 60px;
}

.logo-large {
    font-family: 'Poppins', sans-serif;
    font-size: 72px;
    font-weight: 700;
    color: #2c3e50;
    letter-spacing: -2px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 20px;
    color: #5a6c7d;
    margin-bottom: 40px;
    font-weight: 400;
}

.main-search-container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto 60px;
    position: relative;
}

.main-search-input {
    width: 100%;
    padding: 20px 60px 20px 24px;
    font-size: 18px;
    border: 2px solid #e1e8ed;
    border-radius: 50px;
    outline: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    font-family: 'Inter', sans-serif;
}

.main-search-input:focus {
    border-color: #4a90e2;
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.2);
}

.main-search-input::placeholder {
    color: #95a5a6;
}

.main-search-icon {
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    color: #7f8c8d;
    cursor: pointer;
    transition: color 0.3s ease;
}

.main-search-input:focus ~ .main-search-icon {
    color: #4a90e2;
}

.main-search-results {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background-color: white;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    max-height: 400px;
    overflow-y: auto;
    display: none;
    z-index: 100;
}

.main-search-results.show {
    display: block;
}

.calculators-section {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    width: 100%;
    margin: 0 auto;
}

.calculator-card {
    background: white;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
}

.calculator-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    border-color: #4a90e2;
}

.calculator-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
}

.calculator-title {
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 12px;
    line-height: 1.3;
}

.calculator-description {
    font-size: 15px;
    color: #5a6c7d;
    line-height: 1.5;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination-button {
    padding: 8px 16px;
    border: 1px solid #e1e8ed;
    background: white;
    color: #5a6c7d;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    text-decoration: none;
}

.pagination-button:hover:not(.active):not(:disabled) {
    border-color: #4a90e2;
    color: #4a90e2;
    background: #f8fafc;
}

.pagination-button.active {
    background: #4a90e2;
    color: white;
    border-color: #4a90e2;
}

.pagination-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-info {
    color: #5a6c7d;
    font-size: 14px;
    margin: 0 16px;
}

.feedback-section {
    width: 100%;
    background: white;
    padding: 60px 20px;
    text-align: center;
    border-top: 1px solid #e1e8ed;
    margin-top: 80px;
}

.feedback-content {
    max-width: 600px;
    margin: 0 auto;
}

.feedback-title {
    font-size: 28px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 16px;
}

.feedback-description {
    font-size: 16px;
    color: #5a6c7d;
    margin-bottom: 32px;
    line-height: 1.6;
}

.feedback-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
    color: white;
    padding: 16px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(74, 144, 226, 0.3);
}

.feedback-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(74, 144, 226, 0.4);
}

@media (max-width: 768px) {
    .main-content {
        padding: 20px;
        min-height: calc(100vh - 64px);
    }
    .logo-large { font-size: 48px; }
    .tagline { font-size: 18px; margin-bottom: 30px; }
    .main-search-input { font-size: 16px; padding: 16px 50px 16px 20px; }
    .calculator-grid { grid-template-columns: 1fr; gap: 16px; }
    .calculator-card { padding: 24px; }
    .feedback-section { padding: 40px 20px; margin-top: 60px; }
    .feedback-title { font-size: 24px; }
    .pagination { flex-wrap: wrap; }
    .pagination-info { width: 100%; text-align: center; margin: 8px 0; }
}

@media (max-width: 480px) {
    .main-content { min-height: calc(100vh - 60px); }
    .logo-large { font-size: 40px; letter-spacing: -1px; }
    .tagline { font-size: 16px; }
    .calculator-icon { width: 40px; height: 40px; }
    .calculator-title { font-size: 18px; }
    .calculator-description { font-size: 14px; }
    .feedback-button { padding: 14px 28px; font-size: 15px; }
    .pagination-button { padding: 6px 12px; font-size: 13px; }
}

.main-search-result-item {
    padding: 16px 24px;
    border-bottom: 1px solid #f0f4f8;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: block;
    color: inherit;
}

.main-search-result-item:last-child { border-bottom: none; }
.main-search-result-item:hover { background-color: #f8fafc; }

.main-search-result-title {
    font-weight: 600;
    color: #2c3e50;
    font-size: 16px;
    margin-bottom: 4px;
}

.main-search-result-title strong { color: #4a90e2; }

.main-search-result-description {
    font-size: 14px;
    color: #7f8c8d;
    line-height: 1.4;
}

.main-search-no-results {
    padding: 32px;
    text-align: center;
    color: #7f8c8d;
    font-size: 15px;
}

.main-search-results::-webkit-scrollbar { width: 6px; }
.main-search-results::-webkit-scrollbar-track { background: #f8fafc; border-radius: 3px; }
.main-search-results::-webkit-scrollbar-thumb { background: #cbd5e0; border-radius: 3px; }
.main-search-results::-webkit-scrollbar-thumb:hover { background: #a0aec0; }

.pagination.hidden { display: none; }

.icon-finance svg, .icon-ai svg, .icon-math svg,
.icon-science svg, .icon-health svg, .icon-engineering svg {
    width: 24px;
    height: 24px;
}